Liang-Chi Hsieh created SPARK-17574:
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Summary: Cache ShuffleExchange RDD when the exchange is reused
Key: SPARK-17574
URL: https://issues.apache.org/jira/browse/SPARK-17574
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Liang-Chi Hsieh
We have the rule ReuseExchange to reuse exchange in the physical plan. However,
for a ShuffleExchange we still need to retrieve remote blocks again when the
shuffle exchange is reused. We can cache the RDD of the reused ShuffleExchange
to avoid transferring remote blocks again.
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